Portable ice-cream freezer



June 3, 1952 F. sE BAsTlAN PORTABLE ICE-CREAM FREEZER 2 SHEETS- SHEET l Filed Feb. 4, 1950 June 3, 1952 F, 5E BASTIAN 2,599,021

PORTABLE ICE-CREAM FREEZER Filed Feb. 4, 1950 2 SHEETS-SHEET 2 Patented June 3, 1952 `frmenu imiiron-CREAu/r FREEZER a'ilrporatibnLf-Illinois "Arniicetieniebruary 4, 1950, Serial No. 142,497 laime (01.259-53) ievntittie`twffnite creanrfreezerajand nipte `lparticular1y 'with a small "portable ice cream freezer 'for``se`ii1the hqnf t.

Prior home Afreezers havegeither been hand in semetpror freezers with fariiiliai'.

e power 'source generally eeiiplriag either e and erfaiilgwor small electricH motor hasfbeen located teatrali/y cfa brsigemember te fgrliljaheadunt extending eeli'ess the t0ny ofthe Qlletmteier 0'1 caetne- Seth eler-idees ,are eubtjtentiellr terjlike in Vfm1 and ereletehedzte thejtep '0i the fittings to preventrelative rotation and to prevent dis` engagement therefroni. `The latches are generally suiiicientlv 'Complicated-,as yto be diriiculttr 'a mechanically unskilled .person to operatel and become progressively more diiiicult to operate as the weeden easing becomes deformed byeltemete soaki-rlgand dry-ing out. The alternate soaking and drying out Apresen-113s another problem in that it eventually splits the Weed S0 that iC'e and Salt can run out to dama-ge a floor or other supporting sigliffacesL Some freezers 'obvia'te the necessity of avlatch by having square or othernpncircular-outer.casing with a head unit 'comprising a power seuree and a lidof similar non circular conguration fitting partly weithin the easing@ having a deaemiineanee fitting within the Outer Gesine With a lid covering the entire top of the outer casing it Tis impossible to tell when ice must be added yand it is equally Unpossible to add ice as the original charge of Aice melts-.- Some means must be provided for holding the inner container in axiaiaiignment with the 'outer easing as the lid is placed in position sc tliat the couplings between the Ipower source and theinnepcontainer can be properlyr aligned.- Ae additional dieetevantege infie-rentv with were 0r, ether eenen: cular casings is that a onsideraloleamount of ice in each borner of the afSfng haslttle or no freezing eiect andconsequtl isfvvasted. i

Bridge type khead are rally capable tianfohieago, 111., assign@ agb anufeeturing Company! Chieatfbrlll This invention general yfdritejnplates Vall '1mproved circular outer 'casing With a flatcfliless bridge type head unit hal/ing A`electric'iiotolr to drive iheiniieifntainea The 'cuter 'ca-me is 'd ,plastic which 'is may be ileerte. infermi 15e petition. ptehle vfvthlate d l2. ee t0n u nits (1)21 the few positions possible with a zi'oric'ircuiar An object-, 0i this intensita i'l` the firvision f a, pomme ice Jcream `freezer hating a resilient Waterproof outer easing;`

Another object of the pir' teilt invention is the provision fin a Portable ice orean freezer of,.`a 1atchiess head ph is secured fric'triaiiy anja po e1y by placing it in psitin atop the eutereaen'e- A "speeflejetieet of the r" ini/entit is the provision f D .tablelic eain freezer having a needn t V ioned tc'deforniy a resilient gasketi ar'es'illeht outer 01'1- casing engaging portions of the head unit;

Figure 4 is a sectional view taken along the line 4-4 of Figure 1;

Figure 5 is a sectional view along the line 5 5 of Figure 1';

Figure 6 is a perspective view of a portion of the underside of the lid of therinner container showing a driving lug formed thereon; Y.

Figure 7 is a sectional view taken along the line 'I-I of Figure 2;

Figure 8 is a sectional view taken substantially along the line 8-8 of Figure '7;

Figure 9 is a sectional view taken along the line 9--9 of Figure 8; and Y Figure 10 is a sectional view taken alongthe line I0-I0 of Figure 7. Y

In Figure 1 my freezer may be seen to com prisea circular outer container or casing I2, which in the preferred embodiment is made of resilient plastic material. Resilient metal could be used, butrwould transfer heat to the melting ice from the air more rapidly than plastic. Near the top of the casing are a pair of diametrically spaced handles I4 which may be formed r Y integrally with the casing if desired. The upper rim of the casing is provided with an outwardly directed flange I6 and a rubber gasket I8 (Figure 7) embraces the ange and the top inner edge of the casing I2. provided with a drain hole I9 and the bottom .of the casing is provided with a central raised portion 22 having a recess depression 24 in the center thereof.V An inner, or ice cream container 26 comprising a metal cylinder is located within the casing I2 and is provided with a nub 28 on `the bottom thereof which fits within the recess 24. Metal is preferred for this container because .of its heat transferring properties. The capacity of this container is preferably one quart to serve an average family and to operate with ice lc-ubes from a home refrigerator without freezing an extra load of cubes. A circular cap 30 fits over the top of the inner container 26 and is adapted to be driven rotationally as will be apparent hereinafter. Spaced inwardly from the peripheral flange 32of the cap 30 is a driving lug `34 (Figures 5 and 6) having a leading edge 36 which is substantially perpendicular to the top of the cover and impinges against a bracket 38 welded or otherwise secured to the inner surface of the container 26 adjacent to the top edge thereof. The trailing edge 40 of the lug 3'4 is diagonally disposed relative to the top portion of the cover while the portion 42 of the bracket 38 which is normally not contacted by the lug is diagonally disposed relative to a radius of the container 26 so that the cap may be removed by rotating itcounter-'clockwise as seen in Figure 5 to cam it from the top of the container.

Within the container 26 is located a dasher generally designated 44. 'Ihe dasher includes a vertical shaft 46 having a smoothly curved lower end fitting within the nub 28 of the bottom of the container. The upper end 48 of the shaft is noncircular in cross section and extends upwardly through a raised non-circular .hub 50 of the cap 30 and is secured against rotation ias will be apparent hereinafter. Disposed between the ends of the shaft 46 are a plurality of short, radially The sidewall of the casing is directed paddles 52 and a pair of longer paddles 54 which support vertically positioned wooden members 56. It is to be understood that relative rotation of the dasher 44 and the container 26 causes an ice cream mix within the container to be agitated and blended as it is frozen. A

Motive power for the freezer is provided by a head unit generally designated 58 and best seen in Figure '7. The head unit'includes an integral frame unit 60 preferably formed of metal. The frame unit includes diametrically spaced handles '62 having depending flanges 64 positioned thereunder.

Theiianges 64 (Figure 3) are arcuate in form and have vertically positioned ribs 68 on their outer surfaces. The flanges 64 are suitably spaced to cause the ribs to exert an outward force against the rubber gasket I8 to distort the gasket andthe casing I2 in order that the flanges may be *gripped securely and the anges are deeper at the top than at the bottom to exert a wedging action on the gasketl and container. The frame 60 also includes a gear box 68 (Figures 7 and 8) with a motor mounting plate 'I0 secured above it by screws 'II spaced about the periphery of the plate 'I0 and threaded into the frame 60.

An4 electric motor I2 having a line cord 13 is secured to the mounting plate 'I0 by screws 'I4 and has a shaft 'I6 extending below the mounting plate 10 into the gear box 68 at which point a spur gear 18 is secured to it. The upper end of the motor shaft 'I6 extends above the motor 'I2 and has secured to it a fan for cooling the motor. The motor is covered by a cup-shaped housing 82 secured to the frame 60 by screws spaced through earsv 84 extending outwardly from the housing 82. Air is admittedto the housing through apertures 86 in the top (Figure 2) and is expelled through apertures 88 in the side wall of the housing (Figure 1). The gear 'I8 is meshed'with a larger gear 60 journalled for rotation on a shaft 92 secured to the motor mounted plate 10. A smaller gear 94 is formed integral with or pinned to the gear for rotationtherewith and is meshed with a large gear 96 mounted on a shaft 98 journalled in the motor mounting plate 'I0 and in the frame 60. A small gear |00 is pinned to the gear 96 and meshes with a gear |02. The gear I 02 is provided with an arcuate groove I04 in its upper face within which is positioned the circular depending flange |06 of a cap I 08 forming a grease-tight joint softhat the gear box 68 may be lled with grease at all times. The cap |08 has an upstanding nose H8 which is oblong in cross section and ts in a slot in a cross bar II2 (Figures 8 and 9) secured to the frame 60 by means such as screws II4. The nose III! receives the non-circular upper end 46 of the shaft 46 to lock the dasher 44 against rotation. The lower face of the gear V|02 is provided with a depending ange II6. The periphery of the ange I I6 is circular and is journalled for rotation in a Vbearing Il8 which comprises a flanged cylinder having its lower edge peened over against the under edge of the gear box 68, said under edge being provided with radial indentations II9 to preclude rotation of the bearing. The inner surface of the flange IE6 is star shaped in cross section (Figure 10) to receive the square upstanding hub 50 of the inner container cap 30`to rotate the cap and container.

To operate the portable ice cream freezer herein disclosed, it is necessary to fill the container 26 with a uid mixture to be frozen, to place the Y dasher 44 in the container and the lid 30 theref over. The container 26 is placed within the casthe headv unit bearing against the gaskety [8. toY

deform the gasket and the resilient wall of the container l2 to secure the head unit in place by clamping action. The space between the container and casing I2 is then lled with a mixture of salt and ice cubes from a home refrigerator and the line cord 'I3 is plugged in to energize the motor 12. I have found that three trays of ice cubes are sufficient to freeze a quart of ice cream, and as present day refrigerators freeze four trays, suicient ice cubes are left in the refrigerator for other purposes. As the ice cream mix Within the container 26 freezes, it becomes quite stiff and rotation of the container becomes difficult. Due to the speed reducing action of the gears disclosed, a comparatively small inexpensive high speed motor may be used to deliver suicient torque to the container tcp to rotate the container even after the ice cream mix has become quite stiff. After a predetermined time the ice cream will be sufficiently frozen that the line cord may be disconnected and the head unit may be lifted from the top of the casing, dasher shaft, and container cover. The container may be left embedded in the mixture of ice and salt until such time as the ice cream is to be eaten. It is preferable when so leaving the container to remove the dasher and plug the central opening in the top of the cap 30, as ice and salt may then be packed above the container Without danger of contaminating the ice cream.

It is apparent that I have herein disclosed a portable ice cream freezer which obviates the necessity of chipping up a cake of ice, which has a resilient waterproof outer casing to prevent damage to a supporting surface, and which is more readily assembled and disassembled than prior freezers.

Although a particular form of my invention has been shown and described, it is to be understood that this is for illustrative purposes only and that my invention contemplates all that fairly falls within the spirit and scope of the appended claims.

The invention is hereby claimed as follows:

l. A portable ice cream freezer comprising a deformable resilient outer casing, an inner container for an ice cream mix, means in said container for stirring the ice cream mix, driving means for causing relative motion between said container and said stirring means, frame means supporting said driving means, and arcuate, dependent ange means on said frame means and engageable with the wall of said outer casing, the faces of said flanges contacting the side wall of said casing being diametrically spaced a distance differing from the normal diameter of the casing wall where contacted whereby to displace said casing wall from its normal position to grip said anges.

2. A portable ice cream freezer as set forth in claim 1 in which the anges iit inside the wall of said resilient casing and are diametrically spaced a distance greater than the normal diameter of said resilient casing to displace the wall outwardly.

3. A portable ice cream freezer as set forth in claim 1 in which the' faces of the flanges contacting the container wall are provided with ribs for insuring secure holding action.

4. A portableV mixing orstirring... device comprisingan outer casing. a bridge member extending-across the top of said casing and leaving the top of the casing mainly open, saidbridge member resting on, top of; said. casing and substantially, laterally frictionally intertting therewith, stirring,VJ means carried byv said bridge member andE extending into said casing, and means on said bridge member for driving said stirring means.

5. A portable mixing or stirring device comprising an outer casing, a resilient section atop said casing, a bridge member extending across the top of said casing and leaving a substantial portion of the top of said casing open, said bridge member laterally digging into said resilient section to deform said section to secure said bridge member, stirring means carried by said bridge member and extending into said casing, and means on..said bridge member for driving said stirringmeans.

6. A portable ice cream freezer comprising an outer casing, an inner container for an ice cream mix, means for stirring the ice cream mix including driving means, means for supporting said driving means in the vicinity of the upper end of said outer casing, said supporting means having small surface areas adapted to engage areas on said outer container to exert pressure laterally of said container frictionally to resist relative rotation between the parts, said small surface areas deforming the areas on said outer casing a substantial degree.

7. A portable ice cream freezer comprising an outer casing, an inner container for an ice cream mix, means including driving means for stirring said ice cream mix, a bridge member extending transversely across the upper end of said outer casing and leaving a large portion of said upper end open, said bridge member having surface areas adapted to engage complementary peripheral surface areas of said outer casing and exert pressure laterally of said casing whereby frictionally to resist relative rotation between the parts.

8. A portable ice cream freezer comprising a resilient, deformable outer casing, an inner container for an ice cream mix, means in said container for stirring the ice cream mix, driving means for causing relative motion between said container and said stirring means, and means for supporting said driving means from said outer casing including dependent flange means engageable with the wall of said outer casing, said flange means being provided with substantially vertical anges tapering in thickness from top to bottom to provide a wedging action as said ange means are interfitted with said outer casing to deform said casing and secure said supporting means against rotation relative to said casing.

9. A portable ice cream freezer comprising an outer casing having an open upper end, bridgelike supporting means extending across said upper end and leaving said upper end largely open, electric motor means carried by said supporting means, stirring means carried by said supporting means and driven by said electric motor means, and deformable means interposed between said supporting means and said outer casing for increasing the frictional resistance to rotation between said supporting means and said outer casing.

FORD `SE BASTIAN.

(References on following page) f REFERENCES CITED Number The following references are of record in the 2,181,089 me of this patent: Y 2,234,485

Y VUNITED STATES PATENTS 5 Number Name Date Number 2,042,176 Hausman May 26, 1936 504,398 2,047,720 Wilhelm July 14, 1936 Name Date Kettleborough Nov. 21, 1939 Connor Mar. 11, 1941 FOREIGN PATENTS Country Date Germany Aug. 9, 1930 

